We just bought our first draft horse over the weekend, a 16.2 h Percheron, not that tall but super thick and stocky. My local feed store sells both Nutrena & Purina brands. What would be the best for feed? I have read that draft should be on a low sugar diet but am having a hard time reading the labels. Can anyone suggest a specific feed type? He will be used mostly for light work and trail riding.